SR770 – 100 kHz FFT analyzer

Technical Specifications

Frequency
Measurement range: 476 ?Hz to 100 kHz
Spans: 191 mHz to 100 kHz in a binary sequence
Center frequency: Anywhere within the 0 to 100 kHz measurement range
Accuracy: 25 ppm from 20 ?C to 40 ?C
Resolution: Span/400
Window functions: Blackman-Harris, Hanning, Flat-Top and Uniform
Real-time bandwidth: 100 kHz

Signal Input
Number of channels: 1
Input: Single-ended or differential
Input impedance: 1 M?, 15 pF
Coupling: AC or DC
CMRR (at 1 kHz): 90 dB (input range <-6 dBV)
80 dB (input range <14 dBV)
50 dB (input range ?14 dBV)
Noise:
Typ. 5 nVrms/?Hz at 1 kHz (-162 dBVrms/?Hz)
Max. 10 nVrms/?Hz (-155 dBVrms/?Hz)

Amplitude
Full-scale input range: -60 dBV (1.0 mVp) to +34 dBV (50 Vp) in 2 dB steps
Dynamic range: 90 dB (typ.)
Harmonic distortion: No greater than -80 dB from DC to 100 kHz (input range 0 dBV)
Spurious: No greater than -85 dB below full scale (<200 Hz).
No greater than -90 dB below full scale to 100 kHz
(-50 dBV input range).
Input sampling: 16-bit A/D at 256 kHz
Accuracy: ?0.3 dB ? 0.02 % of full scale (excluding windowing effects)
Averaging: RMS, Vector and Peak Hold. Linear and exponential averaging up to 64k scans.

Trigger Input
Modes: Continuous, internal, external, TTL
Internal level: Adjustable to ?100 % of input scale. Positive or negative slope.
Min. trigger amplitude: 10 % of input range
External level: ?5 V in 40 mV steps. Positive or negative slope. 10 k? Impedance
Min. trigger amplitude: 100 mV
External TTL: Requires TTL level, (low 2 V)
Post-trigger: Measurement record is delayed by 1 to 65,000 samples (1/512 to 127 time records) after the trigger. Delay resolution is 1 sample (1/512 of a record).
Pre-trigger: Measurement record starts up to 51.953 ms prior to the trigger. Delay resolution is 3.9062 ms.
Phase indeterminacy: <2?

Display Functions
Display: Real, imaginary, magnitude or phase
Measurements: Spectrum, power spectral density, time record and 1/3 octave
Analysis: Band, sideband, total harmonic distortion and trace math
Graphic expand: Display expand up to ?50 about any point
Harmonic marker: Displays up to 400 harmonics
Data tables: Lists Y values of up to 200 points
Limit tables: Detects data exceeding up to 100 user-defined upper and lower limit trace segments.

Source
Amplitude range: 0.1 mVp to 1.0 Vp
Amplitude resolution: 1 mVp (output >100 mVp), 0.1 mVp (output <100 mVp)
DC offset: <10.0 mV (typ.)
Output impedance: <5 ?, 50 mA peak output current

Sine Source
Frequency range: DC to 100 kHz
Resolution: 15.26 mHz
Amplitude accuracy: ?1 % (0.09 dB) of setting
Spectral purity: (Harmonics and sub-harmonics)
-80 dBc, f 10 kHz
(Spurious)
<-100 dB full scale

Two-Tone Source
Frequency range: DC to 100 kHz
Resolution: 15.26 mHz
Amplitude accuracy: ?1 % (0.09 dB) of setting
Spectral purity: (Harmonics and sub-harmonics)
-80 dBc, f 10 kHz
(Spurious)
-100 dB full scale

White Noise Source
Frequency range: DC to 100 kHz (all spans)
Flatness: <1.0 dBpp (rms averaged spectra)
Pink Noise Source
Frequency range: DC to 100 kHz (all spans)
Flatness: <4.0 dBpp (using 1/3 octave analysis)
Chirp Source
Output: Equal amplitude sine waves at each frequency bin of the current span
Flatness: <0.05 dBpp (typ.), <0.2 dBpp (max.)
Phase: AutoPhase function calibrates to current phase spectrum.

General
Monitor: Monochrome CRT. 640H by 480V resolution. Adjustable brightness and position.
Interfaces: IEEE-488.2, RS-232 and Printer interfaces standard. An XT keyboard input is provided for additional flexibility.
Hardcopy: Screen dumps and table and setting listings to dot matrix and LaserJet compatible printers. Data plots to HP-GL compatible plotters (RS-232 or IEEE-488.2).
Data storage: USB drive
Power: 60 W, 100/120/220/240 VAC, 50/60 Hz
Dimensions: 17″” ? 6.25″” ? 18.5″” (WHL)
Weight: 36 lbs.
Warranty: One year parts and labor on defects in materials and workmanship

 

Others

N/A